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General Chemistry
Published in Steven L. Hoenig, Basic Chemical Concepts and Tables, 2019
Le Chatelier’s Principle states that when a system is in equilibrium and there is a change in one of the factors which affect the equilibrium, the system reacts in such a way as to cancel out the change and restore equilibrium.
Chemical Equilibrium
Published in Franco Battaglia, Thomas F. George, Understanding Molecules, 2018
Franco Battaglia, Thomas F. George
from which we see that an increase in Kx as pressure increases means that the equilibrium has moved in the direction in which Δν < 0. According to Le Chatelier’s principle, an increase in pressure must induce processes that oppose that increase; specifically, the equilibrium (11.1) would move in the direction along which the reaction gaseous components decrease their molar number (a circumstance which would entail a decrease of pressure). Likewise, decreasing the volume displaces the equilibrium in the direction along which the molar number of reaction gaseous components decreases.
Thermodynamic Principles
Published in James F. Pankow, Aquatic Chemistry Concepts, 2018
Many readers will be most familiar with Le Chatelier’s Principle from considerations of what happens to the position of a chemical equilibrium when the level of one of the actual chemical reactants or products is changed under conditions of constant T and P. In particular, increasing the level of one or more of the reactants will shift the equilibrium towards the products, and increasing the level of one or more products will shift the equilibrium towards the reactants. For these two types of cases, it is the constancy of the equilibrium constant at constant T and P that yields the observed behavior. As noted in the main text, the effects on K from changing T at constant P and changing P at constant T can also be deduced based on Le Chatelier’s Principle. In particular, the effects on K values from changing T and P may be deduced by considering T to be an embodiment of heat, P to be an embodiment of negative volume, and by considering enthalpy and volume as implicit reactants or products. P acts like negative volume because as P increases, volume always decreases.
Valorization of palm oil via cross-metathesis reaction using 1-octene
Published in Chemical Engineering Communications, 2022
It is well established that the molar ratio of the reactant partners determines the outcome of the CM reactions. It is commonly recognized that adding excess reactant to a reversible reaction system will shift the equilibrium to the product side, according to the Le Chatelier principle. At the same time, the reaction would also favor the self- metathesis of the individual reactants involved in the reaction, when an excess of the reactant is given to the overall reaction.